fix regression in event check

Author: tgloeggl

classes/OCRestClient/ApiEventsClient.php

@@ -190,7 +190,7 @@ public function getBySeries($series_id, $course_id)
                     if (empty($oc_event->publications[0]->attachments)) {
                         $media = [];
 
-                        if (empty($oc_event->mediapackage)) {
+                        if (!isset($s_event->mediapackage)) {
                             continue;
                         }
 
@@ -221,10 +221,6 @@ public function getBySeries($series_id, $course_id)
                             $media[] = $obj;
                         }
 
-                        if (is_null($oc_event->publications[0]->media)) {
-                            continue;
-                        }
-
                         $oc_event->publications[0]->media       = $media;
 
                         if (is_null($oc_event->publications[0]->attachments)) {